Door lock



M. cum-3M.

DOOR LOCK.

APPLICATION FILED DEC-28.1918.

1,413,830. Pa n ed Apr. 25, 1922-.

IIIIIIIF NT. .9? 15C E 5 P fT-E MICHAEL CUDERA, orsoLIiicrEa eERMAny.

noon 1100K.

Sne ification Application filed December 28, 1918. Serial No. 268,760.

To all whom it may concern:

Be it known that I, MICHAEL CUDERA, a citizen of the German Republic,and resident of Solingen, Germany, have invented certain new and usefulImprovements in Door Locks, of which the following is a specification,

This invention relates to an improved door lock having a sliding shaftand a trigger head pivoted thereon and normally locked but to bedisengaged electrically, and its novelty consists in the fact that thetrigger head is prevented from turning by the abutment pin of a pivotalcatch, which latter is turnable on a pivot of said shaft and which canbe retracted with its abutment pin to'release said trigger head by meansof an electromagnet and held in said position by means of a springuntil, when opening the door and thereby turning the trigger head, saidshaft is pressed back and the catch, which is compelled-to participatein said backward movement, is freed from said spring, whereupon itpasses freely over the latter during the following return movement ofthe trigger head to its initial position and again locks the lattertherein by means of its abutment pin; the trigger head being providedwith a shoulder which bears against the end of said shaft, said shoulderlimiting the turning movement of the trigger during the opening of thedoor and preventing its being carried beyond the path of said abutmentpin.

The accompanyin drawing shows the improved door lock: 1 is a front viewof the same with removed cover; Fig. 2 is asection on the line zz ofFig. 1; Fi 3 shows part of Fig. 2 in a plan view.

'On the lock bottom a, a sliding shaft 5 is movably held by a bolt (Z. Aspring 6, which is mounted on a pin f of the shaft 6 between the latterand the rear lock wall 9, tends to press the shaft and trigger 0 towardthe locking plate It. The trigger 0 is pivoted to a pin a of the shaft 6so as to be turnable toward the lock wall a, while it is pressed intoits locking position by means of a spring 70. Furthermore, on a pin Z ofthe shaft 6 a pivotal catch on. is mounted, straddling the end of theshaft 6 and having a pin a mounted between its walls, said pin normallyabutting the end of shaft 5 to hold catch min proper position to allowthe shoulder c of trigger head 0 to contact with said pin 02, thuspreventing trigger head 0 from turning in a direction to allow openingof the door. The

catch on is connected by a link 0' with a bolt 79, over which engages aplate 9, which is suspended so as to swing toward electromagnets 7 Uponthe latter being excited, the plate 9 i in a direction to allow openingof the door.

As catch m is retracted, its forward edge passes the head of a spring twhich snapping up in front of said catch holds it in trigger releasingposition as shown in Fig. 3 in dotted lines. Thereupon, the door can beopened,- forcing the head of trigger c to turn over toward the lock walla against the action of its spring is and issuingfrom the locking plateh but as far only as is necessary for opening the door. Thereby, alsothe shaft b is pushed back sufficiently to free catch m from the spring16, while it is again adjusted to its original position by a spring 2,the electromagnets being then no longer excited. When closing the door,the head of trigger 0 is pressed backwards and, upon the door havingbeen closed, again pressed intothe looking plate It by means of thespring 6, the abutment pin a coming then again in locking engagementwith the trigger head by action of spring a as above described. Fromoutside, the door can be opened by means of a lock key in such away thatan arm a forming a pivotal knee-lever'and engaging ina recess to oftheshaftb is correspondingly adji)isted by turning said key. (see arrow,F 1

on the pin f outside the lock casing. The electric disengagement of thetrigger may be effected from any point or points where This can also beeffected from inside the door by means of a knob '12, which is locatedan electric contact for the electromagnets'r can be provided.

What I claim, is In a door lock, in combination, a. sliding shaft havinga trigger head pivoted thereon,

a pivot on said shaft, a pivotal catch turnable on said pivot, anabutment pin on saidcatch said pivotal catchin its retracted position,and a shoulder on said trigger head to bear against the end of saidshaft, said shoulder my hand in the presence of two subscribing limitingthe turning movement of the trigger Witnesses.

during the openin of the door and preventing its being carri ed-beyondthe path of said MICHAEL CUDERA' 5' abutment pin, substantiallyas and for the VltIlGSSGSZ purpose set forth. t V HASE NOLDEN,

In testimony whereof I have hereunto set CORNELIA HAMMES-FAHR.

